My mother had bought some walnut oil, and needed some advice.
Here is my suggestion. It's a simple classic, which you can change to suite you ingredients, or taste.
First off, you need some nice salad stuff, of a slightly bitter and mustardy sort. Rocket is the obvious one, but wilder things, that might be growing quite by accident in you garden, will be worth trying. Dandelion, and several assorted similar things, will be good.
Assemble your washed greenery, and dress with nothing but a little of your walnut oil, maybe a little olive oil as well, a few drops of lemon juice, some crisply fried streaky bacon, cut into nice little 1 cm squares, and some hard sheep cheese, shaved with a sharp potato peeler. A grind of black pepper, some salt, and you are done.